Gearing.



' N0 MODEL.

No. 774,252. I PATENTED NOV. 8, 1904.

W. H. HULTGREN.

GEARING.

APPLIGATION FILED APR. 26, 1904.

WITNESSES lI/VENTOR A rra/m rf UNITED STATES Patented November 8, 1904.

PATENT Orrics.

\VILLIAM H. HULTGREN, OF PHILADELPHIA,

PENNSYLVANIA, ASSIGNOR GEARING- SPECIFICATION forming part of LettersPatent No. 774,252, dated November 8, 1904. 7

Application filed April 26, 1904. Serial No. 204,966. (No model.)

To all whom it may concern:

Be it known that I, TILLIAM H. HULTGREN, of the city and county ofPhiladelphia, State of Pennsylvania, have invented an Improvement inGearing, of which the following is a specification.

My invention has reference to gearing for elevators and mechanicaldevices generally; and it consists of certain improvements which arefully set forth in the following specification and shown in theaccompanying drawings, which form a part thereof.

The object of my invention is to provide means for operating thecable-winding drum which shall embody special adjusting devices for theworm-gearing to compensate for wear.

My invention further comprehends worm and worm-wheel gearing for driving the drum, combined with adjustable sleeve-bearings for theworm-shaft adapted to be adjusted from outside of the inclosing casingto accurately center the worm relatively to the worm-wheel, a feature ofspecial importance in connection with the use of the Hindley type ofworm.

My invention also includes minor features of construction, which,together with those above mentioned, will be better understood byreference to the drawings, in which Figure 1 is a side sectionalelevation of the devices of an elevator embodying my invention. Fig. 2is a cross-section of a portion of the same on line 4 4; of Fig. 1, andFig. 3'is is an elevation of a portion of the adjusting devices for theworm-shaft.

A is the winding-drum and is drivenby a shaft A. Secured to the shaft Ais a wormwheel A, which is driven by a worm A secured to the worm-shaftB. The worm-wheel and worm are inclosed within a casing A". Theworm-shaft B is driven by a pulley D and has loosely journaled upon itthe pulleys D D for normally supporting the drivingbelts when not on thepulley D, as is well known in elevators of this type.

G is a brake-pulley acted upon by a brakeshoe G.

The end of the worm-shaft B is journaled in a bushing O, adjustablelongitudinally by a screw B carried in the head B, secured to the casingAt A spline or key 6 between the 5 bushing O and head B prevents thebushing from rotating. A cap B fits the end of the bushing and enablesthe screw B to act centrally upon said bushing for its adjustment. Thebushing is preferably flanged, and between its flanged end and the wormI arrange an antifriction-collar c to take the thrust and reduce thewear. The other end of the shaft B is journaled in an adjustable sleeveO,which is directly screwed at B into a head B secured to the casing A.A collar 0 is also interposed between the end of the sleeve O and theworm to reduce friction and wear. The sleeve O. has its outer endextended beyond the head B and is provided with a notched 5 flange Gwhich is locked in position when properly adjusted by a locking-plate(1*, which is bolted in position when the adjustment is made. The end ofthe sleeve O is further provided with a stutfing-box containing the 7packing O and agland O, which latter is held in place by the bolts O,passing through the gland and carried by the notched flange of thesleeve 0, as shown in Figs. 2 and 3. By these adjustable parts the wormA can be adjusted longitudinally, so as to be accurately centeredrelative to the axis of the wormwheel A While this adjustment is notnecessary with ordinary worm and worm-wheel construction, it is afeature of very great import-anee in the use of that type of worm knownas the Hindley worm, in which the teeth fit closely to the teeth of theworm-wheel throughout the entire length of the worm.

While my improvements are especially de- 5 signed for elevator-hoistingmachines and are shown as applied thereto, it is to be understood that Ido not confine myself to any particular use of the invention, as it maybe applied to any worm and worm-wheel gearing, 9 and, further, while itis specially intended for use with what is known as the Hindley worm itmay be adapted to any other worm. While I have shown the various detailsin the form which I have found excellently adapted for the purpose of myinvention in commercial use, I do not restrict myself to the minordetails, as they may be modified in various ways without departing fromthe spirit of the invention.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows:

1. The combination of a wormwheel, a worm of the Hindley form meshingwith the worm-wheel, a worm-shaft, a casing or frame inclosing the worm,adjustable bearings for the worm-shaft upon each end of the frameadapted for longitudinal adjustment, and supporting means for the saidbearings secured to the casing.

2. The combination of a wormwheel. a worm meshing with the worm-wheel, awormshaft, a casing or frame inclosing the worm, adjustable bearings forthe worm-shaft upon each end of the frame adapted for longitudinaladjustment, supporting means for the said bearings secured to thecasing, an adjustingscrew extending to the outside of the casing foradjusting one of the bearings, means for holding the other bearing inits adjusted position, and a stuffing-box carried by said lastmentionedbearing through which the wormshaft extends.

3. The combination of a worm-wheel, a worm meshing with the worm-wheel,a wormshaft, a casing or frame inclosing the Worm, adjustable bearingsfor the worm upon each end of the frame adapted for longitudinaladjustment, supporting means for the said bearings secured to thecasing, means for holding the bearings in their adjusted position tohold the worm in the central position, and a stufling-box carried by oneof the bearings and through which the worm-shaft extends. 4. Thecombination of a worm-wheel, a worm meshing with the Worm-Wheel, acasing or frame surrounding the worm, a wormshaft for rotating the worm,an annular boaring surrounding the worm-shaft and adjustably securedthrough the side of the casin and having a notched flange outside of thecasing, a locking device having a tooth adapted to engage with thenotched flange for holding the bearing against rotation within thecasing after adjustment, and a stuffing-box carried by the bearing andsurrounding the worm-shaft.

5. The combination of a worm wheel, a worm meshing with the worm-wheel,a casing or frame surrounding the worm, a wormshaft, a head B secured tothe casing and surrounding the worm-shaft, an adjustable bearing C inwhich the worm-shaft is journaled guided within the head B and having ascrewthreaded connection therewith at B and means to hold the saidbearing against rotation when properly adjusted.

6. The combination of a worm wheel, a worm meshing with the worm-wheel,a casing surrounding the worm, a worm-shaft, a head B secured to thecasing and surrounding the worm-shaft, an adjustable bearing C in whichthe worm-shaft is journaled guided within the head B and having ascrew-thread ed connection therewith at C means to hold the saidthreaded connection therewith and also having its perimeter outside ofthe support notched at B and means to hold the said bearing againstrotation when properly adjusted consisting of a toothed plate G fittingnotches in the perimeter of the sleeve.

7. The combination of a wormwheel, a worm meshing with the worm-wheel, acasing or frame surrounding the worm, a wormshaft, a head 13* secured tothe casing and surrounding the worm -shaft, an adjustable bearing C inwhich the worm-shaft is journaled guided within the head B" and having ascrew-threaded connection therewith at B, and means to hold the saidbearing against rotation when properly adjusted, and a stuffing-boxsurrounding the worm-shaft and carried by the adjustable hearing.

In testimony of which inventionI have hereunto set my hand.

WVILLIAM H. HULTGREN.

WVitnesses:

R. M. KELLY, WILLIAM RooNEY.

